Just a suggestion, maybe they could reconfigure the F-INSAS in a BASIC, MULTIPHASE SYSTEM system.
In the first phase they could just add P-RAILS for AKMs & INSAS rifles, along with optics and Night Vision Devices( may be imported) along with Radio Comm Device.
In the next phase they could add Armour, helmet and the Multipurpose bags with helmet mounted night sights.
After that IMHO they could go for the GPS and hand held computers with network centric warfare capabilities.